Continuous flow rotary pump

Abstract

A continuous flow axial-flow pump for impelling a fluid under a continuous pattern without kinetic side effects to minimize and eliminate damage to fluid, the pump comprising two axial adjacent rotors rotating in opposite directions.

We claim:  
     
       1. A continuous axial flow blood pump having at least one stage, comprising an outer casing and rotor assembly mounted in the casing, the rotor assembly comprising: 
       at least two adjacent rotors rotating in opposite directions with angular speeds ω 1  and ω 2  complying with the formula:            g   ·     H   2           η   2     ·     ω   2         =     -                    g   ·     H   1           η   1     ·     ω   1         .                       
     
     
       2. A method of pumping blood comprising the steps of: 
       providing intake and exhaust conduits;  
       providing blood; and  
       pumping the blood between the intake and exhaust conduits using a continuous axial-flow pump having at least one stage comprising an outer casing and rotor assembly mounted in the case, the rotor assembly comprising at least two rotors rotating in opposite directions, the rotors being independently driven.  
     
     
       3. A method of pumping blood comprising the steps of: 
       providing intake and exhaust conduits;  
       providing blood; and  
       pumping the blood between the intake and exhaust conduits using a continuous axial-flow pump having at least one stage comprising an outer casing and rotor assembly mounted in the casing, the rotor assembly comprising at least two rotors rotating in opposite directions and in compliance with the following formula:            g   ·     H   2           η   2     ·     ω   2         =     -                    g   ·     H   1           η   1     ·     ω   1         .